Pressure controlled water system with isolatable pressure switch

Claim 2

A pressure water system comprising a pump having a discharge line, motor drive means coupled to said pump, a service line terminating in a service valve and a pressure responsive valve between said discharge line and said service line adapted to close upon a rise in service line pressure to a predetermined value, a pressure switch in circuit with said motor drive means, means pressure coupling said pressure switch to said system on the service side of said pressure responsive valve, valve means adapted to block said pressure coupling during open condition of said pressure responsive valve and while supplying water to service, and unblock said pressure coupling during a minimum and no-flow condition of said system, and pressure maintaining means in said system responsive to the opening of said service valve causing initial flow with corresponding pressure reduction, to cause said pressure switch to connect said motor drive means in circuit and drive said pump, flow from which causes said pressure responsive valve to open and block said pressure coupling .

Claim 3

A pressure water system in accordance with claim 1, characterized by said pressure switch being set to disconnect said pump motor from circuit at a pressure value of the order of the closing pressure of said pressure responsive valve and set to connect said pump in circuit at a pressure value of the order of 8 p s i below the circuit opening pressure.

Claim 4

A pressure water system comprising a pump, a motor connected to drive the pump, a service line for delivering water to a service valve, a pressure regulating valve between the pump and the service line adapted to regulate the maximum pressure in the servicE line when the service valve is open and the pump is functioning, a pressure switch in electric circuit with said motor and in hydraulic circuit with said service line, said swith being adapted to close the electric circuit and connect said pump motor when exposed to a predetermined low pressure in the service line of a value below said valve regulated pressure, and to open the electric circuit and disconnect said pump motor when exposed to a service line pressure approximately that of said valve regulated pressure, means responsive to the opening of the pressure regulating valve to close the hydraulic circuit to said pressure switch and thus isolate said pressure switch when the regulating valve opens, and to maintain the hydraulic circuit to said pressure switch closed until the pressure regulating valve is substantially completely closed, whereby said pressure switch may function to disconnect said pump motor at approximately the regulated pressure.

Claim 5

A pressure water system comprising a pump, a motor connected to drive the pump, a service line for delivering water to a service valve, a pressure regulating valve between the pump and the service line adapted to regulate the maximum pressure in the servicE line when the service valve is open and the pump is functioning, a pressure switch in electric circuit with said motor and in hydraulic circuit with said service line, said swith being adapted to close the electric circuit and connect said pump motor when exposed to a predetermined low pressure in the service line of a value below said valve regulated pressure, and to open the electric circuit and disconnect said pump motor when exposed to a service line pressure approximately that of said valve regulated pressure, means responsive to the opening of the pressure regulating valve to close the hydraulic circuit to said pressure switch and thus isolate said pressure switch when the regulating valve opens, and to maintain the hydraulic circuit to said pressure switch closed until the pressure regulating valve is substantially completely closed, whereby said pressure switch may function to disconnect said pump motor at approximately the regulated pressure.

Claim 6

The system of claim 3 wherein said pressure regulating valve closes through a disc of resilient, compressible material of low durometer and the motion of the valve in compressing the disc during closing is the motion that opens said hydraulic circuit and expose said pressure switch to service line pressure.